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%What is our purpose for the mission. Why? How will we achieve our mission objectives? Water, energy, nutrition  %Estimate:  %Mass, Volume, Power budgets  % Why are we going?  % Are we alone?  % Water, energy, nutritions  %  Use pasos Throughout the billions of years of Earth geologic history,it still took several hundreds of millions of years before evolution allowed for complex, intelligent organisms to inhabit the Earth. As soon as free thinking and self-reflection was possible in animals, naturally some of the first questions were the big philosophical ones: What is the origin of life and the universe? What are the conditions necessary to support and develop life? Are we alone in the universe?